Device for cleaning dusters or erasers



Feb. 9, 1932. E. H. TAIT 1,844,722

DEVICE FOR CLEANiNG DU-STERSOR ERASERS Filed May 28, 1929 "22 I NE EINVENTOR ATTORNEY f/mer Ii 7 v 5% E Patented Feb. 9, 1932 ELMEB. H.TAKE, PORTLAND, OREGON DEVICE FOR CLEANING DUSTERS OR- FRASER-SApplication filed May 28, 1929. Serial No. 366,666.

Um'rs STATES PATET oFFIcE F The primary purpose and object of myinvention is to clean clusters or erasers used in school rooms for thecleaning of blackboards.

It has for its object the cleaning of the eraser and the removal of thechalk dust particles from the eraser without the liberating of the samein the room where they are being cleaned. The primary object is to cleanthe object quickly and economically and to collect 1 the dust within adust collector provided for that purpose.

The invention in its simplest form COIlSlSLb of a housing, a motordriven suction fan disposed within the housing, a removable beater headdisposed in bearings rotatably mounted within the housing and means formaintaining the objects to be cleaned in intimate contact with thebeater head and a discharge outlet leading from the housing and having adust collector bag detachably secured thereto. The device in itspreferred form is made portable to facilitate moving from room to room.

A further object of my invention consists in providing a machine for usein school rooms and other places that is relatively cheap in first costand through the use of which the erasers of a large school room orschool building may be cleaned without the i liberation of dust withinthe room and the work be accomplished in a fraction of the time that itcan now be done with the present equipment.

With these and incidental objects in view, the invention consists incertain novel features of construction and combination of parts, theessential elements of which are set forth in the app-ended claims, and apreferred form of embodiment of which is hereinafter shown withreference to the drawings which accompany and form a part of thisspecification.

In the drawings: Fig. 1 is a top plan view of the device. Fig. 2 is aside view of the mechanism illustrated in Fig. 1.

Fig. 3 is a longitudinal, sectional view of the device, the same beingtaken on line 3-3 of Fig. 2 looking in the direction indicated.

- 5 Fig. 4 is a fragmentary, sectional View of throughout the severalviews.

the frame of the device illustrating the beater head and the means formaintaining the eraser-s in intimate contact with the beater head as thesame are being passed through. This view is taken on line 4 4 of Fig. 3looking in the direction indicated. Fig. 5 is a detailed,sectional, sideview of the suction fan and the spindle upon which the same is mounted.1

Fig. 6 is a fragmentary, side view of the closure plate removablysecured to the frame and after the removal of the same the beater headmay then be taken from the machine.

Fig. 7 is a fragmentary, sectional, side view of the mechanismillustrated in Fig. 6 the same being takenon line 7-7 of Fig.6 lookingin the direction indicated.

Fig. 8 is a fragmentary, sectional, side view of the supporting bracketinto whichone end of the beater head is removabiy held, the same beingtaken on line 8-8 of Fig. 4 lookingin the direction indicated.

Fig. 9 is a sectional, side view of the housing illustrating the beaterhead and the support, ing table over which the eraser-passes, andillustrating an eraser imposition within the device and in intimateengagement with the beater head.

Like reference characters refer to like parts I preferably form mydevice of a framed housing 1 having a superposed electric motor 2removably secured to the housing. A suction fan Bis disposed upon thearmature shaft 5 of the electric motor. The fan is removably secured tothe armature shaft 5 and is held thereupon by a locking nut 4c that isin threaded engagement with the lower end of the armature shaft 5.Thesuction fan has a sleeve 6 disposed upon its lower end having a beltgroove 7 in its lower outer surface. A beater head 8 is mounted withinthehousing. The heater head consists of a shaft 9 having a frictionlessbearing 10 disposed in each end.

A plurality of outwardly extending vanes 11 5 are disposed spirallyaboutthe ou'tersurface of the beater head and a groove .12 is formed inand centrally of the beater head about which a driving belt 18 isdisposed. One end of the shaft is mounted within a receiving socket 14in the side wall of the housing and the opposite end of the shaft 9 isflattened as illustrated at 15 for engagement in an open slot formed ina lug 16 disposed within the housing on a side wall opposite socket 14.The shaft is pressed into position and held in place by the driving belt13 which is preferably made of live rubber or other material that isunder normal driving tension. The under side of the housing is cut away,as illustrated at 17 to permit the beater head to extend substantiallybelow the under surface of the housing. Referring to Fig. 9, a duster oreraser 18 to be cleaned is placed within the cleaner the back of whichrests upon a compressible table 19 and the surface of the eraser to becleaned then contacts with the beater head and the dust liberated fromthe eraser is withdrawn into the housing of the machine by the suctionfan and is discharged therefrom through the discharge outlet 20 andcollected withi :1 the dust collector bag 21. Compressible elements assprings 22 are disposed upon the spindles 23 and should be of suflicienttension to press the eraser surface of the eraser upward against theunder surface 24 of the housing and maintain the same in intimatecontact with the beater head. The beater head will normally feed theeraser through the device but feeding may be ac complished by theforcing of the eraser through the machine by the next to be pressedthrough. The compressible base upon which the back of the eraser rests,due to the compressible elements as the springs 22 and 23, willaccommodate crasers of Various depths being automatically pressedthrough the machine.

While the form of mechanismherein shown and described is admirablyadapted to fulfill the objects primarily stated, it is to be understoodthat it is not intended to confine the invention to the one form ofembodiment herein shown and described, as it is susceptible ofembodiment in various forms, all coming within the scope of the claimswhich follow.

WVhat I claim is:

1. A device of the class described, comprising a housing, a power drivenfan disposed within the housing, a sleeve disposed centrally of anddownwardly extending from the fan, a fan belt groove formed within thelower end of the sleeve, a beater head rotatably disposed within thehousing and detachable therefrom, a belt groove formed within andcentrally of the beater head, a belt trained about the beater headgroove and the sleeve groove, and a depressible table disposed beneaththe beater head and adapted to maintain the object being cleaned inintimate contact with the beater head.

2. A device of the class described, comprising a housing, an electricmotor removably mounted on the top of the housing having its armatureshaft disposed within the housing, a fan mounted upon the armature shaftdisposed within the housing, said fan adapted to create a suction withinthe housing for carrying away the dust residue, a sleeve disposedcentrally of and downwardly extending from the fan, a beater headdisposed within the housing, a belt groove formed on the beater head, abelt trained about said groove and sleeve, and a feeding table disposedimmediately below the beater head and adapted to maintain the objectbeing cleaned in intimate contact with the beater head.

ELMER l-I. TAIT.

